Winforms – Datagridview, disable button/row

buttondatagridviewdelete-rowwinforms

I have a datagridview on a form with some data. The 1st column contains button for deleting the row. How can we disable this button or the entire row based on some condition, so the row cannot be deleted?

Best Answer

Would you consider just turning the button cell into a regular empty text box disabled?

Dim cell As DataGridViewButtonCell = dgv.row(x).cell(y)
cell = New DataGridViewTextBoxCell()
cell.value = String.Empty
cell.ReadOnly = True

It loses its bordered "Button" appearance and blends in with the remainder of the cells (assuming you are using primarily the default DataGridViewTextBoxCells).

Here's the equivalent in C#, plus it grays out the field to make it look read-only:

var cell = dgv[column, row] = new DataGridViewTextBoxCell();
cell.Value = ""; // ignored if this column is databound
cell.ReadOnly = true;
cell.Style.BackColor = Color.FromKnownColor(KnownColor.Control);

Related Solutions

C# – Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on

As per Prerak K's update comment (since deleted):

I guess I have not presented the question properly.

Situation is this: I want to load data into a global variable based on the value of a control. I don't want to change the value of a control from the child thread. I'm not going to do it ever from a child thread.

So only accessing the value so that corresponding data can be fetched from the database.

The solution you want then should look like:

UserContrl1_LOadDataMethod()
{
    string name = "";
    if(textbox1.InvokeRequired)
    {
        textbox1.Invoke(new MethodInvoker(delegate { name = textbox1.text; }));
    }
    if(name == "MyName")
    {
        // do whatever
    }
}

Do your serious processing in the separate thread before you attempt to switch back to the control's thread. For example:

UserContrl1_LOadDataMethod()
{
    if(textbox1.text=="MyName") //<<======Now it wont give exception**
    {
        //Load data correspondin to "MyName"
        //Populate a globale variable List<string> which will be
        //bound to grid at some later stage
        if(InvokeRequired)
        {
            // after we've done all the processing, 
            this.Invoke(new MethodInvoker(delegate {
                // load the control with the appropriate data
            }));
            return;
        }
    }
}

Android: combining text & image on a Button or ImageButton

For users who just want to put Background, Icon-Image and Text in one Button from different files: Set on a Button background, drawableTop/Bottom/Rigth/Left and padding attributes.

<Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/home_btn_test"
        android:drawableTop="@drawable/home_icon_test"
        android:textColor="#FFFFFF"
        android:id="@+id/ButtonTest"
        android:paddingTop="32sp"
        android:drawablePadding="-15sp"
        android:text="this is text"></Button>

For more sophisticated arrangement you also can use RelativeLayout (or any other layout) and make it clickable.

Tutorial: Great tutorial that covers both cases: http://izvornikod.com/Blog/tabid/82/EntryId/8/Creating-Android-button-with-image-and-text-using-relative-layout.aspx

Best Answer

Related Solutions

C# – Cross-thread operation not valid: Control accessed from a thread other than the thread it was created on

Android: combining text & image on a Button or ImageButton

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